Six-wheel equalizing truck



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Patented Sept. 29, 1925.

UNITED STATESy LAWRENCE RICHARDSON, 0F LOUISVILLE, KENTUCKY.

SIX-WHEEL EQUALIZING TRUCK.

Application iiledfAugust 6, 1923. Serial No. 655,829.

To aZZ whom t may concern:

Be it known that I, LAWRENCE RICHARD- soN, a citizen of the United States7 residing at Louisville, in the county of Jefferson and State of Kentucky, have invented certain new and useful Improvements in a 'Six- Wheel Equalizing Truck, of which the following is a specification.

This invention relates to a six wheel equalizing truck. l

One ob'ect of the invention is to provide a flexible truck construction having a minimum wheel base and in which the bolsters are midway between the journals.

Another object is to provide a fiexible six wheel truck arrangement in which the various parts cooperate in an improved manner to properly distribute the loads.

JAnother object is to provide a six wheel truck adapted to meet the various requirements under service conditions.

These and other objects are accomplished by means of the arrangement disclosed on the accompanying sheets of drawings, in which- Figure 1 is a fragmentary top plan view of a six wheel truck embodying my invention;

Figure 2 is a fragmentary side elevation of the same, parts being in section for the sake of clearness;

Figure 3 is a side elevation of one of the side frame members;

Figure 4 is a side elevation of an associated side frame member;

Figure 5 is a side elevation of an equalizing beam for spanning the members of the side fr ame for properly distributing the loads;

Figure 6 is a sectional view taken in the plane of line 6 6 of Figure 2; and

vFigure 7 is a sectional view taken in the plane of line 7-7 of Figure 2.

The various novel feature of the invention will be apparent from the following description and drawings, and will be particularly pointed out in the appended claims.

Referring to the figures of the drawings, it will be noted that my invention is illustrated in connection with a six wheel truck having side frames, only one of which is shown, each of which side frames includes members 10 and 11 which are flexibly connected at their inner ends in any suitable manner, such as by a tongue portion 12l on one side frame member 11 telescopically arranged with respect to a receiving portion 13 on the other side frame member 10.r

Walls 14 and 15 are formed at the inner ends of the side frame members 10 and 11 respectively, for receiving an intermediate journal box, and said side frame members are also provided with jaws or pedestaly portions 1G for receiving end journal boxes. Each of said side frame members 10 and 11 is of a truss-like structure and has an opening for the reception of an associated transverse bolster member 17. Said bolster members are mounted upon springs 18 which are supported upon spring seats 19 which,

in this instance, are floating, that is tosay,

one side 20 of each spring seat 19 is pivotally mounted or fulcrumed upon a shoulder portion 21 of the tension member of the associated side frame, and the other side 11 for locating the beam 25 with respect The left hand end of the beam` thereto. has no downwardly extending. projection but rests upon the upstanding shoulders 28 which form a pocket 29 which is the same as the pocket 27 in the side frame member 11. Preferably the pocket 29 normally is filled by a bar to give greater bearing surface for the left hand end of the beam. It will be appreciated that the beam may be reversed and the projection 26 rest in the pocket 29.

In order to secure a minimum wheel base in a six wheel truck, the bolsters must be brought from the inside of the truck to the outside at a point midway between the wheels. This, however, does not'give proper equalization of the load as both bolster legs deliver loads to the center wheel while @Illy One bolster leg delivers a load to the outside wheel nearest it. Accordingly, as is well understood, to secure the proper distribution the resultant of the delivered load should be nearer the outside wheels and, as is well known, the resultant load should be delivered twice as tar from the middle wheels as from the end wheels. This is accomplished in the present structure wherein the bolsters 17 are midway between the wheels, by irst having the spring seats 19 pivotally resting upon the side frame members l0 and 11 at points substantially 'twice as far from the middle wheels .as from the outer wheels whereby a portion of the load is delivered properly. To -deliver the balance of the load transmitted through the bolster members at the proper points, such remainingl portion of the load is transmitted through the inner vsides yof the spring seats 19 .and through the links 23 to the beam 25, the .ends of which in turn rest upon the side rameymembers 10 and 11 vertically over the ulcruming points 2l for the spring seats, whereby the total resultant load is delivered .at a point twice as far from the middle wheels as from the end wheels. In this way the load is distributed and equalized.

It will be noted that the equalizing beam 25 is symmetrically loaded. It is possible to vary practically all of the relations and, at the same time, obtain the desired result. The hangers 23 may be moved toward the center wheels. This decreases the hanger load but increases the load delivered direct. The resultant is the same, however. There may be another variation by moving the spring seat .support in or out. However, if the beam vsupport is moved in the opposite direction the .above effect will be compensated and the resultant remain unchanged.

It is my intention to cover all modiiications of the invention falling within the spirit and scope of the following claims.

I claim: Y

l. In a six wheel truck, the combination of a side frame, bolster members located midway between Aadjacent pairs of wheels tor minimizing the wheel base., and means including a beam engaging upper portions of said side frame for equalizing the bolster loads on the wheels of the'trucl.

2. In a six wheel truck, the combination of articulated side frame members, bolster members located midway between adjacent pairs of wheels for minimizing the wheel base, and means including a beam spanning said side frame members and engaging upper portions ythereof for equalizing the bolster loads on the wheels of the truck.

3. In a ,six wheel truck, the combination of a side frame, a bolster member intermediate adjacent pairs of wheels, a support for each bolster member, one side oi" each of which support rests upon the associated .Side frame; an equalizng beam.. and means,

for supporting the opposite side of each of said bolster supports from said equalizing beam whereby the loads from said bolsters are equalized on the wheels of the truck.

' 4. In a six wheel truck, the combination of articulated side frame members, a bolster member associated with each of said side frame members, supports for carrying said bolsters, each of said supports at one side being carried on said side frame members, an equalizing beam spanning and resting upon said side frame members, and links connecting the other side of .said bolster supports with said equalizing beam whereby the bolster loads are equalized with respect to the wheels of the truck.

5. In a six wheel truck, the combination of a side frame, bolster members intermediate adjacent pairs of wheels, a bolster support for each bolster, one side of each bolster support being supported on the side frame twice as far from the middle truck wheel journals as from the .end truck wheel journals, an equalizing beam, and means for supporting the opposite sides of said bolster supports from said equalizing beam, said equalizing beam resting upon said side frame at points twice as far from the middle truck wheel journals as from the end truck wheel journals whereby the loads transmitted through the bolsters are equalized with respect to the wheels of the truck.

6. In a siX wheel truck, the combination of a side frame, bolster members located midway between adjacent pairs of wheels, an equalizing beam resting upon said side frame, and means for dividing the bolster loads through the side frame in one path and through the equalizing beam and side frame in another path for equalizing the load with respect to the truck wheels.

7. In a six wheel truck, the combination of articulated side frame members, a bolster associated with each of said side traine members and located midway between adjacent pairs of wheels, an equalizing ybeam spanning said articulated side frame members and resting thereupon at points twice as far from the middle truck wheel journals as from the end truck wheel journals, and a bolster support for each of said bolster members, one portion of each said support being carried by said side frame at a point twice as far from the middle wheel journals as from the end wheel journals and the opposite sides of said bolster supports being connected to said equalizing beam whereby the bolster loads are equalized with respect to all of the truck wheels.

8. In a six wheel truck, the combination of a side frame including two associated side trame members, bolsterl means for transmitting a load to said side frame members, and a load equalizer engaging upper portions of said side trame members.-

lio

9. In a siX Wheel truck, the combination of a side frame including two associated side frame members, bolster means for transferring a load to said side frame members, and a load equalizer carried on the tops of said side frame members.

10. In a six Wheel truck, the combination of a side frame including two longitudinally aligned side frame members, bolster members for transferring a load to said side frame members, and an equalizing beam bearing upon upper portions of said side frame members. A

Signed at Chicago, Illinois, this 8rd day of August, 1923.

LAWRENCE RICHARDSON. 

